JPS5768877A - Lighting device of copying machine - Google Patents

Lighting device of copying machine

Info

Publication number
JPS5768877A
JPS5768877A JP14540980A JP14540980A JPS5768877A JP S5768877 A JPS5768877 A JP S5768877A JP 14540980 A JP14540980 A JP 14540980A JP 14540980 A JP14540980 A JP 14540980A JP S5768877 A JPS5768877 A JP S5768877A
Authority
JP
Japan
Prior art keywords
illuminance
slit
original
optical system
longitudinal direction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14540980A
Other languages
Japanese (ja)
Inventor
Hirohisa Otsuka
Koichi Asakura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP14540980A priority Critical patent/JPS5768877A/en
Publication of JPS5768877A publication Critical patent/JPS5768877A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting

Abstract

PURPOSE:To easily provide an illuminance distribution of an optimum image formation light beam, to each optical system, by placing plural illuminating light emission parts along the longitudinal direction of a slit, and controlling its illuminance in accordance with a copying scale factor. CONSTITUTION:A light source for illuminating an original is divided into plural spot light sources LA1-LA5 along the longitudinal direction of a slit of a slit exposure optical system. In this way, illuminance of the spot light sources LA1- LA5 by a lamp is controlled in accrodance with a copying scale factor, so that an optimum illuminance distribution on the surface of an original can be obtained by 2 different copying scale factors.
JP14540980A 1980-10-17 1980-10-17 Lighting device of copying machine Pending JPS5768877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14540980A JPS5768877A (en) 1980-10-17 1980-10-17 Lighting device of copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14540980A JPS5768877A (en) 1980-10-17 1980-10-17 Lighting device of copying machine

Publications (1)

Publication Number Publication Date
JPS5768877A true JPS5768877A (en) 1982-04-27

Family

ID=15384584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14540980A Pending JPS5768877A (en) 1980-10-17 1980-10-17 Lighting device of copying machine

Country Status (1)

Country Link
JP (1) JPS5768877A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60134226A (en) * 1983-12-23 1985-07-17 Asahi Optical Co Ltd Control device for exposure of slit exposing type variable power copying machine
US4737748A (en) * 1984-07-20 1988-04-12 Minolta Camera Kabushiki Kaisha Copying machine with selective illuminations
US4939546A (en) * 1986-02-28 1990-07-03 Ricoh Company, Ltd. Illuminating device for copier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60134226A (en) * 1983-12-23 1985-07-17 Asahi Optical Co Ltd Control device for exposure of slit exposing type variable power copying machine
US4737748A (en) * 1984-07-20 1988-04-12 Minolta Camera Kabushiki Kaisha Copying machine with selective illuminations
US4939546A (en) * 1986-02-28 1990-07-03 Ricoh Company, Ltd. Illuminating device for copier

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